Scale-up of rotating cylinder electrode electrochemical reactor for Cu(II) recovery: Experimental and simulation study in turbulence regimen

Almazán-Ruiz, Francisco J.; Caballero, Francisco Vidal; Cruz-Díaz, Martín R.; Rivero, Eligio P.; González, Ignacio

doi:10.1016/j.electacta.2012.06.003

Cited by 26 publications

(9 citation statements)

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“…The coagulant performed a similar function as the electrodes, neutralizing the charge of the particulates, thus allowed them to collect and settle at the bottom of the tank. In addition, electrocoagulation-flotation is talented of reducing waste production, time and electrical energy consumption for wastewater [7] [8] [9] while [10] and [11] enhanced electrocoagulation device for treating various types of industrial wastewater and observed how electrocoagulation-flotation(ECF) reactor can be effective, according to wastewater type, pH, current density and type of metal electrodes (aluminum, steel). Among all the various technologies available, electrolysis is one of the best.…”

Section: Introductionmentioning

confidence: 99%

A Review of Promising Electrocoagulation Technology for the Treatment of Wastewater

Sadik¹

2019

ACES

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A review of the literature published on topics interrelated to electrochemical treatment within wastewater by using sacrificial anodes was presented. Electrocoagulation (EC) is a technique used for water and has a great ability on various wastewater treatments, industrial processed water, and medical treatment. It has potential in removing various pollutants such as chemical oxygen demand turbidity, ammonia, color, and suspended solid. One of the most necessities industries is Textile industries which release large volumes of wastewater that contains different dyes. Azo dyes contain strong N = N bond which is not easily broken by conventional methods. The discharge of this type of wastewater to natural watercourse can pose serious environmental impacts to aquatic life. Electrocoagulation (EC) method depends on several factors as electrode material, current density, operation time and PH. The review describes, discusses and compares the types of that electrode influencing the EC process in various wastewater and leachate. Both operating costs and electrical energy consumption values were found to vary greatly depending on the type of electrodes material and solution being treated.

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Section: Introductionmentioning

confidence: 99%

A Review of Promising Electrocoagulation Technology for the Treatment of Wastewater

Sadik¹

2019

ACES

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“…14 The RCE is employed for metal ion removal because this cell allows metal removal from 10,000 to 10 ppm, 15 i.e. this reactor has been used to recover cadmium, 9,16 copper, 11,13 nickel, 17 silver, 18 tin, 19 and zinc. 20 The RCE generates turbulent convection at Re > 100, where peripheral velocity, u, normally lies in the range 0.6-20 m s −1 .…”

mentioning

confidence: 99%

“…The rotating cylinder electrode electrochemical reactor (RCE) is a geometry widely used in the following studies: metal ion recovery, [1][2][3][4][5][6] alloy formation, 1,2 corrosion, 1,2,7 effluent treatment, 5,[8][9][10][11][12][13] and Hull cell studies. 14 The RCE is employed for metal ion removal because this cell allows metal removal from 10,000 to 10 ppm, 15 i.e.…”

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confidence: 99%

“…Good agreement between mass transport correlation and current distribution simulations with experimental data were attained. The rotating cylinder electrode electrochemical reactor (RCE) is a geometry widely used in the following studies: metal ion recovery, [1][2][3][4][5][6] alloy formation, 1,2 corrosion, 1,2,7 effluent treatment, 5,[8][9][10][11][12][13] and Hull cell studies.14 The RCE is employed for metal ion removal because this cell allows metal removal from 10,000 to 10 ppm, 15 i.e. this reactor has been used to recover cadmium, 9,16 copper, 11,13 nickel, 17 silver, 18 tin, 19 and zinc.…”

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Simulations of Turbulent Flow, Mass Transport, and Tertiary Current Distribution on the Cathode of a Rotating Cylinder Electrode Reactor in Continuous Operation Mode during Silver Deposition

Rosales¹,

Nava²

2017

J. Electrochem. Soc.

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This work presents numerical simulations of turbulent flow, mass transport and tertiary current distribution on the cathode of a rotating cylinder electrode reactor (RCE) in a continuous operation mode. A configuration of a RCE with electrolyte inlet at the bottom and the electrolyte exit at the top was employed. Silver electrodeposition (12.15 mol m −3 (1300 ppm) Ag(I), 883.5 mol m −3 (23000 ppm) CN − , pH 13 and 150 mS cm −1 conductivity) was used as a test system. Bulk electrolysis in the RCE was performed at a constant potential of −1.2 V vs. SCE, which ensured complete mass transport control. A constant volumetric inflow rate of 0.1 L min −1 at the RCE inlet was employed. CFD simulations were obtained solving the RANS equations with the standard k −ε turbulence model. For mass transport simulations, the averaged diffusion-convection equation was solved. For the simulations of tertiary current distribution, wall functions were employed. The tertiary current distribution on the RCE interface along the z-coordinate presented one border effect close to the electrolyte inlet, afterwards, even current distribution was obtained. The border effect is created by the abruptly silver concentration depletion at the electrolyte inlet. Good agreement between mass transport correlation and current distribution simulations with experimental data were attained. The rotating cylinder electrode electrochemical reactor (RCE) is a geometry widely used in the following studies: metal ion recovery, [1][2][3][4][5][6] alloy formation, 1,2 corrosion, 1,2,7 effluent treatment, 5,[8][9][10][11][12][13] and Hull cell studies.14 The RCE is employed for metal ion removal because this cell allows metal removal from 10,000 to 10 ppm, 15 i.e. this reactor has been used to recover cadmium, 9,16 copper, 11,13 nickel, 17 silver, 18 tin, 19 and zinc. 20The RCE generates turbulent convection at Re > 100, where peripheral velocity, u, normally lies in the range 0.6-20 m s −1 . 1 In previous studies carried out by our group the influence of using fourplate, six-plate, and a concentric cylinder as counter electrode on the turbulent flow in batch 21 and continuous 22 operation mode have been deeply discussed. In the former paper, the formation of three turbulent Taylor vortex flow for the four-plate and six-plate arrangements was developed, however, these vortexes did not appear in the concentric arrangement. The presence of the Taylor vortex flow was attributed to the turbulence promoted by the plates. Whereas in continuous mode, for the six plate arrangement, only one turbulent Taylor vortex appeared, owing to the electrolyte inflow and outflow modifying the flow pattern in the RCE.On the other hand, the turbulent mass transport is imposed by the angular rate of the inner cylinder and the applied limiting current density. 2,3,23,24 When the flow pattern is developed entirely in the RCE, the parameters of mass transport can be determined by a dimensionless group correlation of the form: Many papers have showed that mass transport correlation, desc...

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“…Esta flexibilidad se deriva de la geometría cilíndrica del reactor y la rotación continua del electrodo, que ofrecen condiciones hidrodinámicas adecuadas dentro del reactor. En consecuencia, se mejora la transferencia de masa y la distribución de corriente, con el fin de lograr eficiencias de recuperación de hasta el 99% para algunos metales [40][41][42][43][44][45][46][47]. Otras ventajas incluyen: la fácil manipulación del RCE (selección apropiada de las dimensiones de cátodo y la velocidad de rotación), la capacidad para trabajar bajo control de transferencia de masa (incrementa el desempeño global de la reacción en la recuperación de metales), la fácil extracción de metal y un buen mezclado del electrolito [46,48]; sin embargo, varias desventajas surgen durante la operación del RCE, entre las que se encuentran la dificultad de encontrar parámetros de escalamiento que permitan conservar la condiciones de transferencia de masa y caída óhmica de los reactores a nivel laboratorio.…”

Section: Reactor Con Electrodo De Cilindro Rotatorio (Rce)unclassified

Recuperación electroquímica de níquel de efluentes con bajas concentraciones (menores a 500 ppm) provenientes de los enjuagues de la Industria de la Galvanoplastia

Tapia

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Scale-up of rotating cylinder electrode electrochemical reactor for Cu(II) recovery: Experimental and simulation study in turbulence regimen

Cited by 26 publications

References 27 publications

A Review of Promising Electrocoagulation Technology for the Treatment of Wastewater

A Review of Promising Electrocoagulation Technology for the Treatment of Wastewater

Simulations of Turbulent Flow, Mass Transport, and Tertiary Current Distribution on the Cathode of a Rotating Cylinder Electrode Reactor in Continuous Operation Mode during Silver Deposition

Recuperación electroquímica de níquel de efluentes con bajas concentraciones (menores a 500 ppm) provenientes de los enjuagues de la Industria de la Galvanoplastia

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